CN206494740U - Compound desulfurization wastewater treatment system - Google Patents

Compound desulfurization wastewater treatment system Download PDF

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Publication number
CN206494740U
CN206494740U CN201720110757.5U CN201720110757U CN206494740U CN 206494740 U CN206494740 U CN 206494740U CN 201720110757 U CN201720110757 U CN 201720110757U CN 206494740 U CN206494740 U CN 206494740U
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China
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desulfurization wastewater
air preheater
deduster
pipeline
chamber
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CN201720110757.5U
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周惠
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NANJING CHONON ENERGY-SAVING TECHNOLOGY Co Ltd
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NANJING CHONON ENERGY-SAVING TECHNOLOGY Co Ltd
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Abstract

The compound desulfurization wastewater treatment system of the utility model belongs to technical field of waste water processing;Technical problem to be solved is:A kind of compound desulfurization wastewater treatment system is provided, realizes that desulfurization wastewater no pollution is discharged, and it is simple in construction, cost is relatively low;The technical scheme used for:High-temperature flue gas pipeline, air preheater, deduster and chimney are sequentially connected, and evaporation chamber system is connected with the connecting pipe between air preheater and deduster, and the structure of evaporation chamber system is:End entrance is communicated with high temperature steam pipeline on vaporization chamber, connecting pipe between air preheater and deduster is connected by feed pipe with the middle and lower part of vaporization chamber, blower fan and air door are installed on feed pipe, the bottom of vaporization chamber is provided with sludge sewage draining exit, pipeline access port of first mixing chamber provided with high-temperature gas and desulfurization wastewater, the first mixing chamber is by first fluid atomizer to evaporation chamber spray feed desulfurization wastewater;The utility model is mainly used in desulfurization wastewater processing, realizes that no pollution is discharged.

Description

Compound desulfurization wastewater treatment system
Technical field
The compound desulfurization wastewater treatment system of the utility model belongs to technical field of waste water processing, and in particular to a kind of desulfurization Waste Water Treatment.
Background technology
The electric structure of China is based on thermoelectricity.Thermal power plant is also sulfur dioxide (SO2) emissions rich and influential family, in order to reduce dioxy Change a large amount of discharges of sulphur, current most domestic coal unit has been mounted with flue gas desulfurization device, and with limestone-gypsum Based on wet desulfurizing process, i.e., substantial amounts of lime stone is added in absorption tower and carrys out sulfur dioxide absorption, both react generation Gypsum calcium sulfate, so as to reach the purpose for removing sulfur dioxide, consolidates while the desulfurization wastewater in absorption tower contains substantial amounts of gypsum Body is, it is necessary to carry out follow-up purification separation processing.Wet desulfurization of flue gas by limestone-gypsum method (Wet Flue Gas Desulfurization, WFGD) technology, because there is coal applied widely, desulfuration efficiency high (>=95%), system can use for it Rate height (>=90%), absorbent utilization rate high (>=90%), lime stone abundance and cheap, technical maturity, reliable etc. Advantage, the dominant technology as domestic and international flue gas desulfurization.Slurries in the sulfur removal technology, can gradually during continuous circulation It is miscellaneous in the impurity such as enriching heavy metal element and Cl-, impurity and flue gas that this partial impurities is come from the dissolving band of lime stone Matter.Due to containing the multiple element including heavy metal element, such as F, Cl, Cd, Hg, Pb, Ni, Cr, these elements in coal A series of chemical reaction is carried out under hot conditions in burner hearth, a variety of different compounds are generated, a part of compound with Clinker discharges burner hearth, and another part enters flue gas desulfurization device with flue gas, is dissolved in absorption slurries, and is absorbing slurries Constantly concentrated in the circulatory system.Meanwhile, there is also heavy metal element in lime stone, such as Hg and Cd, these elements are in lime stone It can also be dissolved into slurries, and be entered in desulfurization wastewater during forming slurries.
In order to maintain the balance of desulfurizer serum recycle system material, prevent the corrosion of desulphurization plant and ensure gypsum matter Amount, it is necessary to a certain amount of waste water is discharged from system.Desulfurization wastewater accounts for share very little, general 2 in waste water of heat-engine plant discharge capacity The desulfurization wastewater that × 300MW units are produced only has 8~10t/h.But desulfurization wastewater is seriously polluted, salt content is high.Contain in waste water Some impurity mainly include suspension, oversaturated sulphite, sulfate and heavy metal, the water quality extreme difference of desulfurization wastewater, Both contain a class of pollutant, two pollutants are contained again.Contained a class of pollutant have the heavy metals such as cadmium, mercury, chromium, lead, nickel from Son, there is very strong contaminative to environment;Two pollutants have copper, zinc, fluoride, sulfide.If desulfurization wastewater is untreated It is directly outer to arrange, severe contamination certainly will be caused to surrounding aqueous environment, therefore, power plant desulphurization system needs synchronized construction desulfurization wastewater to handle System, qualified discharge after necessary processing is passed through by desulfurization wastewater.
Desulfuration waste water treatment process mainly uses physico-chemical process both at home and abroad at present, passes through the sides such as oxidation, neutralization, precipitation, flocculation Method remove desulfurization wastewater in pollutant, with system complex, number of devices is more, working environment is poor, investment and operating cost height, The shortcomings of Cl- in waste water can not be removed and obstacle is caused to the recycling of waste water, its to environment pollution destruction still Seriously.In addition, the organic chemistry medicine and hybrid particles impurity contained by inside the also bad processing of its sludge, this sludge are tighter Weight, again without special processing sludge place, last be flushed to again in ditch river is gone, here it is secondary pollution, after processing Pollution, in addition it is more serious to the pollution destruction of environment than before processing.
Utility model content
The utility model overcomes the shortcomings of that prior art is present, and technical problem to be solved is:There is provided a kind of compound Desulfurization wastewater treatment system, realizes that desulfurization wastewater no pollution is discharged, and simple in construction, and cost is relatively low.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is:Compound desulfurization wastewater processing system System, including high-temperature flue gas pipeline, air preheater, deduster, chimney and evaporation chamber system, high-temperature flue gas pipeline and air preheat The top inlet of device is connected, and the outlet at bottom of the air preheater is connected by pipeline with deduster entrance, described to remove The outlet of dirt device is connected with chimney, and vaporization chamber system is connected with the connecting pipe between the air preheater and deduster System;
The evaporation chamber system includes vaporization chamber, the first mixing chamber, first fluid atomizer, high temperature steam pipeline, wind Machine and air door, the upper end entrance of vaporization chamber is communicated with high temperature steam pipeline and the high temperature steam pipeline is provided with the first valve, Connecting pipe between the air preheater and deduster is connected by feed pipe with the middle and lower part of vaporization chamber, the feed pipe On blower fan and air door be installed, the bottom of the vaporization chamber is provided with sludge sewage draining exit, and first mixing chamber is provided with High Temperature Gas The pipeline access port of body and desulfurization wastewater, the first fluid atomizer is fixed on the middle and upper part of vaporization chamber, and described first mixes Room is closed by first fluid atomizer to evaporation chamber spray feed desulfurization wastewater.
The outlet at bottom of the air preheater is provided with mixing chamber system;
The mixing chamber system includes the second mixing chamber and second fluid atomizer, and second mixing chamber is provided with height The pipeline access port of wet body and desulfurization wastewater, the second fluid atomizer is fixed on the outlet at bottom of air preheater, Second mixing chamber spray feed desulfurization wastewater into the outlet at bottom of air preheater by second fluid atomizer.
The upper end entrance of the vaporization chamber is also connected by the pipeline provided with the second valve with high-temperature flue gas pipeline.
Spray feed high-temperature steam inside oriented pipeline is installed on the connecting pipe between the air preheater and deduster Steam blowing shower nozzle.
The deduster is electric cleaner.
The utility model has the advantages that compared with prior art:
Desulfurization wastewater is atomized by the utility model by evaporating chamber system with high-temperature flue gas evaporation, is re-fed into power plant system and is entered Discharged after row dust removal process, system architecture is simple, and cost is relatively low, high treating effect, realize the no pollution discharge of desulfurization wastewater;
Evaporation chamber system in the utility model and mixing chamber system can isolated operation, be also simultaneously operable, it is de- to tackle The change of sulphur wastewater flow rate, is applicable modulability strong;
The utility model in the pipeline before deduster spray feed high-temperature steam further to desulfurization wastewater steam heat up, prevent Cool when desulfurization wastewater steam is by flue and forming salt crystallization influence treatment effect;
The utility model uses electric cleaner, and desulfurization wastewater steam is handled after entering electric cleaner by electrolysis, heavy metal from Son is adsorbed onto on the battery lead plate of electric cleaner, and most free of contamination gas is discharged into air by chimney at last.
Brief description of the drawings
The utility model is described in more detail below in conjunction with the accompanying drawings;
The system structure diagram that Fig. 1 provides for the utility model;
In figure:1 is high-temperature flue gas pipeline, and 2 be air preheater, and 3 be deduster, and 4 be chimney, and 5 be vaporization chamber, and 6 be the One mixing chamber, 7 be first fluid atomizer, and 8 be high temperature steam pipeline, and 9 be blower fan, and 10 be air door, and 11 be the first valve, 12 It is sludge sewage draining exit for feed pipe, 13,14 be the second mixing chamber, and 15 be second fluid atomizer, and 16 be the second valve, and 17 are Steam blowing shower nozzle.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched The embodiment stated is a part of embodiment of the present utility model, rather than whole embodiments;Based on the reality in the utility model Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made all belongs to The scope protected in the utility model.
The system structure diagram that Fig. 1 provides for the utility model, as shown in figure 1, compound desulfurization wastewater treatment system, Including high-temperature flue gas pipeline 1, air preheater 2, deduster 3, chimney 4 and evaporation chamber system, high-temperature flue gas pipeline 1 and air are pre- The top inlet of hot device 2 is connected, and the outlet at bottom of the air preheater 2 is connected by pipeline with the entrance of deduster 3, institute The outlet for stating deduster 3 is connected with chimney 4, and steaming is connected with the connecting pipe between the air preheater 2 and deduster 3 Send out chamber system;
The evaporation chamber system includes vaporization chamber 5, the first mixing chamber 6, first fluid atomizer 7, high temperature steam pipeline 8th, blower fan 9 and air door 10, the upper end entrance of vaporization chamber 5 is communicated with high temperature steam pipeline 8 and the high temperature steam pipeline 8 is provided with First valve 11, connecting pipe between the air preheater 2 and deduster 3 is by under in feed pipe 12 and vaporization chamber 5 Portion is connected, and blower fan 9 and air door 10 are provided with the feed pipe 12, and the bottom of the vaporization chamber 5 is provided with sludge sewage draining exit 13, institute Pipeline access port of first mixing chamber 6 provided with high-temperature gas and desulfurization wastewater is stated, the first fluid atomizer 7 is fixed on The middle and upper part of vaporization chamber 5, first mixing chamber 6 is useless to the inside spray feed desulfurization of vaporization chamber 5 by first fluid atomizer 7 Water.
Desulfurization wastewater is sent into vaporization chamber 5 by first fluid atomizer 7 and evaporated with high-temperature flue gas by the utility model Atomization, then by the traction feeding power plant system of blower fan 9 discharge after dust removal process, produced in the inside evaporation process of vaporization chamber 5 The crystallization of part salt periodically discharged by sludge sewage draining exit 13, high treating effect realizes the no pollution discharge of desulfurization wastewater, and is System is simple in construction, and cost is relatively low.
The outlet at bottom of the air preheater 2 is provided with mixing chamber system;
The mixing chamber system is included on the second mixing chamber 14 and second fluid atomizer 15, second mixing chamber 14 Pipeline access port provided with high-temperature gas and desulfurization wastewater, the second fluid atomizer 15 is fixed on air preheater 2 Outlet at bottom, second mixing chamber 14 spray feed into the outlet at bottom of air preheater 2 by second fluid atomizer 15 Desulfurization wastewater.
The utility model air preheater 2 outlet set mixing chamber system, can directly will in the second mixing chamber 14 take off Sulphur waste water mixed gas sprays into power plant system and handled.
Evaporation chamber system in the utility model and mixing chamber system can isolated operation, be also simultaneously operable, it is de- to tackle The change of sulphur wastewater flow rate, is applicable modulability strong.
The upper end entrance of the vaporization chamber 5 is also connected by the pipeline provided with the second valve 16 with high-temperature flue gas pipeline 1, By the first valve 11 and any switching laws of the second valve 16, selection is passed through 5 pairs of vaporization chamber using high-temperature flue gas or high-temperature steam Desulfurization wastewater is evaporated atomization, and use is more flexible and saves energy consumption.
Spray feed high-temperature steam inside oriented pipeline is installed on the connecting pipe between the air preheater 2 and deduster 3 Steam blowing shower nozzle 17, further give desulfurization wastewater steam heating, cool and shape when preventing desulfurization wastewater steam by flue Into salt crystallization influence treatment effect.
The deduster 3 is electric cleaner, and desulfurization wastewater steam is handled after entering electric cleaner by electrolysis, heavy metal ion It is adsorbed onto on the battery lead plate of electric cleaner, most free of contamination gas is discharged into air by chimney at last.
Finally it should be noted that:Above example is only to illustrate the technical solution of the utility model, rather than its limitations; Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that: It can still modify to the technical scheme described in previous embodiment, or to which part or all technical characteristic Carry out equivalent substitution;And these modifications or replacement, the essence of appropriate technical solution is departed from the utility model embodiment The scope of technical scheme.

Claims (5)

1. compound desulfurization wastewater treatment system, it is characterised in that:Including high-temperature flue gas pipeline (1), air preheater (2), remove Dirt device (3), chimney (4) and evaporation chamber system, high-temperature flue gas pipeline (1) are connected with the top inlet of air preheater (2), institute The outlet at bottom for stating air preheater (2) is connected by pipeline with deduster (3) entrance, the outlet of the deduster (3) with Chimney (4) is connected, and evaporation chamber system is connected with the connecting pipe between the air preheater (2) and deduster (3);
The evaporation chamber system includes vaporization chamber (5), the first mixing chamber (6), first fluid atomizer (7), high temperature steam pipe Road (8), blower fan (9) and air door (10), the upper end entrance of vaporization chamber (5) is communicated with high temperature steam pipeline (8) and the high temperature steams Steam pipe road (8) is provided with the first valve (11), and the connecting pipe between the air preheater (2) and deduster (3) is by sending Expects pipe (12) is connected with the middle and lower part of vaporization chamber (5), and blower fan (9) and air door (10) are provided with the feed pipe (12), described The bottom of vaporization chamber (5) is provided with sludge sewage draining exit (13), and first mixing chamber (6) is provided with high-temperature gas and desulfurization wastewater Pipeline access port, the first fluid atomizer (7) is fixed on the middle and upper part of vaporization chamber (5), and first mixing chamber (6) is led to First fluid atomizer (7) is crossed to the internal spray feed desulfurization wastewater of vaporization chamber (5).
2. compound desulfurization wastewater treatment system according to claim 1, it is characterised in that:The air preheater (2) Outlet at bottom provided with mixing chamber system;
The mixing chamber system includes the second mixing chamber (14) and second fluid atomizer (15), second mixing chamber (14) Pipeline access port provided with high-temperature gas and desulfurization wastewater, the second fluid atomizer (15) is fixed on air preheater (2) outlet at bottom, second mixing chamber (14) by bottom from second fluid atomizer (15) to air preheater (2) Spray feed desulfurization wastewater in outlet.
3. compound desulfurization wastewater treatment system according to claim 1 or 2, it is characterised in that:The vaporization chamber (5) Upper end entrance is also connected by the pipeline provided with the second valve (16) with high-temperature flue gas pipeline (1).
4. compound desulfurization wastewater treatment system according to claim 3, it is characterised in that:The air preheater (2) The steam blowing shower nozzle (17) of spray feed high-temperature steam inside oriented pipeline is installed on the connecting pipe between deduster (3).
5. compound desulfurization wastewater treatment system according to claim 4, it is characterised in that:The deduster (3) is electricity Deduster.
CN201720110757.5U 2017-02-06 2017-02-06 Compound desulfurization wastewater treatment system Active CN206494740U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109970128A (en) * 2019-04-01 2019-07-05 南京兆能节能科技有限公司 A kind of flue gas desulfurization wastewater treatment system and its processing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109970128A (en) * 2019-04-01 2019-07-05 南京兆能节能科技有限公司 A kind of flue gas desulfurization wastewater treatment system and its processing method

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